CN109477599A - Nipple - Google Patents
Nipple Download PDFInfo
- Publication number
- CN109477599A CN109477599A CN201780044012.6A CN201780044012A CN109477599A CN 109477599 A CN109477599 A CN 109477599A CN 201780044012 A CN201780044012 A CN 201780044012A CN 109477599 A CN109477599 A CN 109477599A
- Authority
- CN
- China
- Prior art keywords
- thread
- width
- male joint
- thread part
- female connector
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 210000002445 nipple Anatomy 0.000 title claims abstract description 90
- 239000011324 bead Substances 0.000 claims description 56
- 239000007787 solid Substances 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 17
- 238000007789 sealing Methods 0.000 description 54
- 229910000831 Steel Inorganic materials 0.000 description 16
- 239000010959 steel Substances 0.000 description 16
- 230000000052 comparative effect Effects 0.000 description 8
- 239000003129 oil well Substances 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 241000397426 Centroberyx lineatus Species 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002343 natural gas well Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L15/00—Screw-threaded joints; Forms of screw-threads for such joints
- F16L15/06—Screw-threaded joints; Forms of screw-threads for such joints characterised by the shape of the screw-thread
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L15/00—Screw-threaded joints; Forms of screw-threads for such joints
- F16L15/04—Screw-threaded joints; Forms of screw-threads for such joints with additional sealings
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L15/00—Screw-threaded joints; Forms of screw-threads for such joints
- F16L15/001—Screw-threaded joints; Forms of screw-threads for such joints with conical threads
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L15/00—Screw-threaded joints; Forms of screw-threads for such joints
- F16L15/001—Screw-threaded joints; Forms of screw-threads for such joints with conical threads
- F16L15/004—Screw-threaded joints; Forms of screw-threads for such joints with conical threads with axial sealings having at least one plastically deformable sealing surface
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
Abstract
The purpose of the present invention is to provide a kind of torque with higher and the nipples of the process time that can shorten threaded portion.Nipple (1) is for linking a pair of of pipe.Nipple (1) has male joint (10) and female connector (20).Male joint (10) has external thread part (11) in periphery.Female connector (20) has internal thread part (21) corresponding with external thread part (11) in inner circumferential.Female connector (20) and male joint (10) fasten.External thread part (11) includes that the constant portion of the width of thread (111) and the width of thread can be changed portion (112).The constant portion of the width of thread (111) has constant thread groove width.The width of thread can be changed the thread groove width that portion (112) have the thread groove width in the constant portion of the width of thread (111) or more and become larger from the constant portion of the width of thread (111) towards the top of male joint (10).Internal thread part (21) includes that the constant portion of the width of thread (211) and the width of thread can be changed portion (212).The constant portion of the width of thread (211) has constant thread wide.The width of thread can be changed that the thread of portion (212) with the constant portion of the width of thread (211) is wide above and the thread that becomes larger from the constant portion of the width of thread (211) towards the center of female connector (20) is wide.
Description
Technical field
The present invention relates to a kind of nipples for linking a pair of of pipe.
Background technique
In the past, it in oil well, natural gas well etc. (hereinafter, also referred to collectively as " oil well "), for recovery of subterranean resources, uses
The oil well pipes such as casing, pipeline.Oil well pipe is made of the steel pipe being linked successively.The connection of steel pipe utilizes nipple.
The form of screw joint for steel pipe is roughly classified into combined and monolithic devices.In the case where combined, Yao Lianjie
A pair of of tubing in a tubing be steel pipe, another tubing is pipe fitting.It is provided in the periphery at the both ends of steel pipe outer
Threaded portion.Inner circumferential at the both ends of pipe fitting is provided with internal thread part.It is screwed into pipe fitting by the external thread part of steel pipe
Threaded portion, steel pipe and pipe fitting are fastened and are concatenated.
In the case where monolithic devices, both a pair of of tubing of Yao Lianjie is steel pipe, does not use pipe fitting.In each steel pipe
In, the periphery in portion is provided with external thread part at one end, and the inner circumferential in the other end is provided with internal thread part.Pass through steel pipe
External thread part is screwed into the internal thread part of another steel pipe, and two steel pipes are fastened and are concatenated.
In general, the internal thread part that is partially inserted into for being provided with external thread part in the tubing of object of connection, therefore, referred to as
Male joint.The part storage external thread part for being provided with internal thread part in the tubing of object of connection, therefore, referred to as female thread connects
Head.Male joint and female connector are a part of tubing, therefore, respectively in a tubular form.
As one kind of screw joint for steel pipe, have thread wide there is known one kind and thread groove width at a constant ratio
The screw joint for steel pipe of the threaded portion of variation.The nipple of such construction has higher torque.It is connect in this screw thread
In head, in general, make-up lead (Japanese: ス タ ブ リ ー De) and load lead (Japanese: ロ ー ド リ ー De) are in the whole of threaded portion
It is constant respectively on body.But, make-up lead and load lead are not consistent.
No. 4087798 bulletins of Japanese Patent Publication No. disclose make-up lead and/or load lead changes from the midway of threaded portion
Nipple.I.e. in the nipple of No. 4087798 bulletins of Japanese Patent, keep thread wide and the variation of thread groove width
Ratio changes in the midway of threaded portion.As a result, about the wide nipple with the type of thread groove width variation of thread, Neng Goumou
Ask the improvement of the tolerance for tensile stress and compression stress.
Summary of the invention
In general, using the cutting tool of size corresponding with the smallest thread groove width in the processing of threaded portion.Therefore, exist
When cutting the thread groove with biggish thread groove width, the cutting number of tube axis direction necessarily becomes more.In Japan
In the nipple for speciallyying permit No. 4087798 bulletin, although the ratio of the variation of thread groove width and non-constant, in threaded portion
Change on the whole.Thus, the difference of the smallest thread groove width and maximum thread groove width is larger.Therefore, there is maximum thread groove
The cutting number of the tube axis direction of wide thread groove especially becomes more, and the process time as threaded portion entirety increases.In addition,
Thread is wide in the case where the variation on the whole of threaded portion, and the wide certainty of thread near end is fairly small.If the thread
Wide and thread height is same degree or smaller than the height of thread, then is being applied with tensile load along tube axis direction
In the case where, it is easy to generate failure by shear in the root with the wide thread of the smallest thread.
A kind of process time for being designed to provide torque with higher and threaded portion capable of being shortened of the disclosure
Nipple.
The screw joint for steel pipe of the disclosure is for linking a pair of of pipe.Nipple has male joint and female connector.
Male joint has external thread part in periphery.Female connector has internal thread part corresponding with external thread part in inner circumferential.Female thread
Connector and male joint fasten.External thread part includes that the constant portion of the width of thread and the width of thread can be changed portion.The screw thread of external thread part
Constant width portion has constant thread groove width.The width of thread of external thread part, which can be changed portion, has the width of thread of external thread part permanent
The spiral shell determining the thread groove width in portion or more and being become larger from the constant portion of the width of thread of external thread part towards the top of male joint
Groove is wide.Internal thread part includes that the constant portion of the width of thread and the width of thread can be changed portion.The constant portion's tool of the width of thread of internal thread part
There is constant thread wide.The width of thread of internal thread part can be changed the thread that portion has the constant portion of the width of thread of internal thread part
Thread that is wide above and becoming larger from the center of the width of thread of internal thread part constant portion towards female connector is wide.
According to the screw joint for steel pipe of the disclosure, the nipple of torque with higher can be set as and shorten spiral shell
The process time in line portion.
Detailed description of the invention
Fig. 1 is the longitudinal section view for indicating the outline of nipple of the 1st embodiment.
Fig. 2A is the longitudinal section view for being exaggerated the constant portion of the width of thread of nipple shown in FIG. 1.
Fig. 2 B is the longitudinal section view for being exaggerated the variable portion of the width of thread of nipple shown in FIG. 1.
Fig. 3 is the longitudinal section view for being exaggerated a part of nipple shown in FIG. 1.
Fig. 4 A is the chart for indicating the make-up lead and load lead of nipple shown in FIG. 1.
Fig. 4 B is the longitudinal section view for being exaggerated the threaded portion of nipple shown in FIG. 1.
Fig. 5 is indicate state that the top of the male joint in the nipple of the 1st embodiment has been in contact with each other vertical
Cross-sectional view.
Fig. 6 is the longitudinal section view for indicating the outline of nipple of the 2nd embodiment.
Fig. 7 is the longitudinal section view for indicating the outline of nipple of the 3rd embodiment.
Fig. 8 is the longitudinal section view for indicating the outline of nipple of the 4th embodiment.
Fig. 9 is the longitudinal section view for indicating the outline of nipple of embodiment.
Figure 10 is the longitudinal section view for indicating the outline of nipple of comparative example.
Figure 11 is the chart for indicating the process time of nipple of embodiment and comparative example.
Specific embodiment
The nipple of embodiment is for linking a pair of of pipe.Nipple has male joint and female connector.Pin thread
Connector has external thread part in periphery.Female connector has internal thread part corresponding with external thread part in inner circumferential.Female connector
It is fastened with male joint.External thread part includes that the constant portion of the width of thread and the width of thread can be changed portion.The width of thread of external thread part
Constant portion has constant thread groove width.The width of thread of external thread part can be changed the constant portion of the width of thread that portion has external thread part
Thread groove width more than and the thread groove that is become larger from the top of the width of thread of external thread part constant portion towards male joint
It is wide.Internal thread part includes that the constant portion of the width of thread and the width of thread can be changed portion.The constant portion of the width of thread of internal thread part has perseverance
Fixed thread is wide.The width of thread of internal thread part can be changed portion have the thread in the constant portion of the width of thread of internal thread part it is wide with
Thread that is upper and becoming larger from the center of the width of thread of internal thread part constant portion towards female connector is wide (the 1st structure).
In the 1st structure, external thread part and internal thread part include that the constant portion of the width of thread and the width of thread can be changed portion.In spiral shell
In line variable-width portion, thread groove width and the wide variation of thread, but in the constant portion of the width of thread, thread groove width and thread are wide
Do not change.By the way that the constant portion of the width of thread is arranged in external thread part and internal thread part, with thread groove width in external thread part and interior spiral shell
Line portion compares the case where gradually changing on the whole, the smallest thread groove width in external thread part and internal thread part with it is maximum
The difference of thread groove width becomes smaller.Thus, in external thread part and internal thread part, the pipe axis of the thread groove with maximum thread groove width
The cutting number in line direction tails off, and can reduce total cutting number of tube axis direction.As a result, it is possible to shorten including external screw thread
The process time in portion and the threaded portion of internal thread part.In addition, constant by the way that the width of thread is arranged in external thread part and internal thread part
Portion, external thread part and interior spiral shell wide compared with external thread part and internal thread part the case where gradually changing on the whole with thread
The difference that the smallest thread in line portion is wide and maximum thread is wide becomes smaller.Thus, in external thread part or internal thread part,
In the case that tensile load is applied with along tube axis direction, it is difficult to produce in the root with the wide thread of the smallest thread
Raw failure by shear.Preferably, for external thread part and internal thread part, the smallest thread is wide all higher than respective thread
Degree is big.
In addition, in the 1st structure, can be changed portion in the width of thread that external thread part is provided with thread groove width variation, with this
The width of thread of the external thread part of sample can be changed the corresponding mode in portion and constitute the variable portion of the width of thread of internal thread part.Therefore,
The nipple for having the 1st structure being capable of torque with higher.
The maximum thread groove width for being also possible to external thread part and internal thread part is the minimum of external thread part and internal thread part
Thread groove width twice or less (the 2nd structure).
For example, thread groove width is in the whole of threaded portion in the nipple documented by No. 4087798 bulletins of Japanese Patent Publication No.
Change on body, maximum thread groove width becomes 3 times or more of the smallest thread groove width, and therefore, the cutting number of thread groove needs 3
More than secondary.On the other hand, as long as the nipple with above-mentioned 2nd structure, it will be able to inhibit the cutting number of thread groove
At following twice.Thus, it is possible to more reliably shorten the process time of threaded portion.
It is also possible in male joint relative in being screwed into of female connector, the top of male joint can in the width of thread
Both the inserting surface and plane of load in change portion do not fasten with same female connector another with the time point that female connector contacts
The tip contact of male joint, after both inserting surface and the plane of load that the width of thread can be changed portion are contacted with female connector
And the tip contact (the 3rd structure) before external thread part surrender with another male joint.
According to the 3rd structure, further can increase torque as needed.
I.e. in the case where nipple does not require high torque performance, in male joint being screwed into relative to female connector
In, the width of thread in external thread part can be changed the time point that both inserting surface and the plane of load in portion are contacted with female connector
Terminate fastening.At this point, the top for the male joint being screwed into female connector not with fastened with the female connector it is another
The tip contact of male joint.
On the other hand, in the case where nipple requires high torque performance, male joint is further torqued into, in outer spiral shell
Make the top of the male joint and the tip contact of another male joint before the surrender of line portion.Pass through the top of two male joints
It is in contact with each other and assigns axle power to each male joint, can increase torque.
Being also possible to male joint also has circular bead surface.Female connector can also have circular bead surface, the circular bead surface and pin thread
The circular bead surface of connector is correspondingly arranged, and can be with the shoulder face contact (the 4th structure) of male joint under tightening state.
According to the 4th structure, when the circular bead surface of male joint and female connector has been in contact with each other, male joint is assigned
Axle power.Therefore, torque can be made to improve.
It is also possible in male joint relative in being screwed into of female connector, the circular bead surface of male joint is wide in screw thread
The time point that both inserting surface and the plane of load for spending variable portion are contacted with female connector does not connect with the circular bead surface of female connector
Touching, after both inserting surface and the plane of load that the width of thread can be changed portion are contacted with female connector and external thread part surrenders it
The preceding shoulder face contact (the 5th structure) with female connector.
Even the 5th structure also can be such that torque rises as needed.
I.e. in the case where nipple does not require high torque performance, in male joint being screwed into relative to female connector
In, the width of thread in external thread part can be changed the time point that both inserting surface and the plane of load in portion are contacted with female connector
Terminate fastening.At this point, the circular bead surface of male joint and female connector each other not in contact with.
On the other hand, in the case where nipple requires high torque performance, male joint is further torqued into, in outer spiral shell
The circular bead surface of male joint and female connector is set to be in contact with each other before the surrender of line portion.Axle power is assigned to male joint as a result, it can
Increase torque.
The length for the tube axis direction that the width of thread for being also possible to internal thread part can be changed portion is wider than the screw thread of external thread part
The length for spending the tube axis direction in variable portion is long (the 6th structure).
According to the 6th structure, the thread of external thread part is easy to be embedded in the thread groove of internal thread part, therefore, by male joint
Female connector is screwed into be easier to.
< embodiment >
Hereinafter, being illustrated referring to attached drawing, while to each embodiment.To structure identical and comparable in figure, phase is marked
Same appended drawing reference, identical explanation is not repeated.
[the 1st embodiment]
(overall structure)
Fig. 1 is the longitudinal section view for indicating the nipple 1 of the 1st embodiment.The nipple 1 of present embodiment is combination
The nipple of type.But, the structure of the nipple described in the present embodiment can also be suitable for the screw thread of monolithic devices
Connector.
As shown in Figure 1, nipple 1 has two male joints 10 and female connector 20.Two male joints 10 and mother
The difference of buckle joint 20 is in a tubular form.Female connector 20 and each male joint 10 fasten.One male joint 10 is by from tube axis direction
One end be inserted into female connector 20, another male joint 10 by from the other end of tube axis direction be inserted into female connector 20.
Each male joint 10 has external thread part 11 in periphery.Female connector 20 has and each 11 phase of external thread part in inner circumferential
Corresponding internal thread part 21.Each external thread part 11 and each internal thread part 21 are made of intermeshing taper thread.Each external thread part
11 and the thread shape of each internal thread part 21 be swallowtail shape.
The external thread part 11 of each male joint 10 includes that the constant portion 111 of the width of thread and the width of thread can be changed portion 112.Female thread
Each internal thread part 21 of connector 20 includes that the constant portion 211 of the width of thread and the width of thread can be changed portion 212.In the constant portion of the width of thread
111, in 211, thread is wide and thread groove width is constant, can be changed in portion 112,212 in the width of thread, and thread is wide and thread groove width
Variation.For this point, explain in detail later.
Fig. 2A is the longitudinal section view for being exaggerated the constant portion 111,211 of the width of thread.Fig. 2 B is to be exaggerated the width of thread can be changed
The longitudinal section view in portion 112,212.
As shown in Figure 2 A and 2 B, the cross-section observation made of with the plane cutting nipple 1 by pipe axis CL, outside
Threaded portion 11 is respectively provided with multiple thread top surface 11a, screw thread groove bottom 11b, inserting surface 11c and plane of load 11d.It is each to insert
Enter face 11c and each plane of load 11d to link thread top surface 11a and screw thread groove bottom 11b.Each inserting surface 11c is connect in pin thread
First 10 relative to face leading in being screwed into of female connector 20.Each plane of load 11d is configured at the opposite of corresponding inserting surface 11c
Side.
The cross-section observation made of with the plane cutting nipple 1 by pipe axis CL, internal thread part 21 are respectively provided with
Multiple thread top surface 21a, screw thread groove bottom 21b, inserting surface 21c and plane of load 21d.Each thread top surface 21a and outer spiral shell
The screw thread groove bottom 11b in line portion 11 is opposite.Each screw thread groove bottom 21b is opposite with the thread top surface 11a of external thread part 11.It is each to insert
It is opposite with the inserting surface 11c of external thread part 11 to enter face 21c.Each plane of load 21d is opposite with the plane of load 11d of external thread part 11.
Each half of thread angle of inserting surface 11c, 21c and plane of load 11d, 21d are less than 0 ° of negative angle.So-called tooth herein
Type half-angle is the face and inserting surface 11c, 21c or plane of load 11d, 21d angulation rectangular with pipe axis CL.In Fig. 2A and
In Fig. 2 B, the half of thread angle of inserting surface 11c, 21c to be positive counterclockwise, and the half of thread angle of plane of load 11d, 21d to be clockwise
Just.
The cross-section observation made of with the plane cutting nipple 1 by pipe axis CL, external thread part 11 preferably have
Multiple fillet surface 11e.Each fillet surface 11e is the inclined surface for linking inserting surface 11c and screw thread groove bottom 11b.It is preferred that fillet surface
11e is 25 °~75 ° relative to the angle, θ of screw thread groove bottom 11b.
In the case where external thread part 11 has fillet surface 11e, internal thread part 21 has each chamfering with external thread part 11
The corresponding fillet surface 21e of face 11e.Each fillet surface 21e of internal thread part 21 and each fillet surface 11e of external thread part 11 are opposite.
As shown in Figure 2 A, under tightening state, in the constant portion 111,211 of the width of thread, the plane of load of external thread part 11
The plane of load 21d of 11d and internal thread part 21 contact with each other.In addition, in the constant portion 111,211 of the width of thread, external thread part 11
Thread top surface 11a and screw thread groove bottom 11b respectively with the screw thread groove bottom 21b of internal thread part 21 and thread top surface 21a
Contact.However, inserting surface 11c, 21c phase is not in contact with each other in the constant portion 111,211 of the width of thread.In external thread part 11 and interior
In the case that threaded portion 21 is respectively provided with fillet surface 11e, 21e, in the constant portion 111,211 of the width of thread, fillet surface 11e, 21e
Also it is mutually not in contact with each other.That is, in the constant portion 111,211 of the width of thread, under tightening state, in external thread part 11 and internal thread part
Gap is generated between 21.
On the other hand, as shown in Figure 2 B, can be changed in portion 112,212 in the width of thread, under tightening state, in external thread part
Gap is not generated between 11 and internal thread part 21.That is, can be changed in portion 112,212 in the width of thread, plane of load under tightening state
11d, 21d are in contact with each other, and inserting surface 11c, 21c are in contact with each other.In addition, can be changed in portion 112,212 in the width of thread, outer spiral shell
The thread top surface 11a in line portion 11 and the screw thread groove bottom 21b of internal thread part 21 contact with each other, and the thread groove of external thread part 11
Bottom surface 11b and the thread top surface 21a of internal thread part 21 contact with each other.It is respectively provided with down in external thread part 11 and internal thread part 21
In the case where edged surface 11e, 21e, it can be changed in portion 112,212 in the width of thread, fillet surface 11e, 21e are also contacted each other.
Fig. 3 is the longitudinal section view for being exaggerated a part of nipple 1.In figure 3 it is shown that in two male joints 10
Part corresponding with a male joint 10 in one male joint 10 and female connector 20.
As described above, the external thread part 11 of male joint 10 includes that the constant portion 111 of the width of thread and the width of thread can be changed portion
112.The constant portion 111 of the width of thread is configured at the base end side (pipe main body side) of male joint 10 in external thread part 11.Screw thread is wide
Spending constant portion 111 has constant thread groove width and thread wide.
The width of thread can be changed portion 112 and be configured at portion 111 more constant than the width of thread in external thread part 11 by male joint 10
Tip side position.The width of thread can be changed portion 112 and be continuously provided with the constant portion 111 of the width of thread.The width of thread can be changed portion
Thread groove widths more than 112 thread groove widths with the constant portion 111 of the width of thread.The width of thread can be changed the thread groove width in portion 112
It is become larger from the top of the width of thread constant portion 111 towards male joint 10.Thus, the width of thread can be changed the screw thread in portion 112
The wide top towards male joint 10 of tooth gradually becomes smaller.
In external thread part 11, thread groove width W11max preferably at most be twice of the smallest thread groove width W11min with
Under.The thread groove width that the width of thread can be changed portion 112 becomes in the range of being not less than the thread groove width in the width of thread constant portion 111
Change.Therefore, the width of thread can be changed portion 112 with the maximum thread groove width W11max in external thread part 11.In addition, external thread part
The smallest thread groove width W11min in 11 is the thread groove width in the constant portion 111 of the width of thread.
In the internal thread part 21 of female connector 20 with can with the constant portion 111 of the width of thread of external thread part 11 and the width of thread
Corresponding mode is provided with the constant portion 211 of the width of thread respectively and the width of thread can be changed portion 212 in change portion 112.
The constant portion 211 of the width of thread is opposite with the constant portion 111 of the width of thread of external thread part 11.The constant portion of the width of thread
211 have constant thread wide and thread groove width.The thread in the constant portion 211 of the width of thread is wide and thread groove width respectively and outside
The thread groove width and thread width in the constant portion 111 of the width of thread of threaded portion 11 are corresponding.
The width of thread can be changed portion 212 and the width of thread of external thread part 11 can be changed portion 112 relatively.The width of thread can be changed portion
212 thread is wide and thread groove width can be changed the thread groove width and thread in portion 112 with the width of thread of external thread part 11 respectively
Width is corresponding.That is the wide thread groove that can be changed portion 112 with the width of thread of external thread part 11 of thread in the variable portion 212 of the width of thread
It is wide correspondingly from the constant portion 211 of the width of thread towards center (one opposite with the top of female connector 20 of female connector 20
Side) it becomes larger.The width of thread of thread groove width and external thread part 11 that the width of thread can be changed portion 212 can be changed the screw thread in portion 112
Tooth is wide correspondingly to be gradually become smaller from the center of the width of thread constant portion 211 towards female connector 20.
In internal thread part 21, thread groove width W21max preferably at most be twice of the smallest thread groove width W21min with
Under.The thread groove width that the width of thread can be changed portion 212 becomes in the range of being not less than the thread groove width in the width of thread constant portion 211
Change.Therefore, the width of thread can be changed portion 212 with the smallest thread groove width W21min in internal thread part 21.In addition, internal thread part
Maximum thread groove width W21max in 21 is the thread groove width in the constant portion 211 of the width of thread.
In external thread part 11 and internal thread part 21, the width of thread can be changed the raising that portion 112,212 mainly helps torque.
The width of thread can be changed portion 112 relative to external thread part 11 whole ratio it can be considered that required torque and suitably determine.
Similarly, the width of thread can be changed portion 212 relative to internal thread part 21 whole ratio it can be considered that required torque and fit
Work as decision.For example, if the length of the whole tube axis direction of external thread part 11 being set as L11, the width of thread can be changed to portion 112
The length of tube axis direction is set as L112, then can be set as 0 < L112/L11 < 1.It is preferred that 0.3 < L112/L11 < 1.0.Separately
Outside, if the length of the whole tube axis direction of internal thread part 21 is set as L21, the width of thread can be changed to the pipe axis side in portion 212
To length be set as L212, then can be set as 0 < L212/L21 < 1.It is preferred that 0.2 < L212/L21 < 0.9.
Fig. 4 A is the chart for indicating the make-up lead and load lead of male joint and female connector.Scheme shown in Fig. 4 A
In table, the longitudinal axis is the size of lead, and horizontal axis is several thread number from the top of male joint or the center of female connector.
Here, being illustrated referring to Fig. 4 B to the make-up lead of male joint and female connector and load lead.Pin thread
The make-up lead of connector is the distance D1a of the tube axis direction between adjacent inserting surface 11c in external thread part 11.Male joint
Load lead be the tube axis direction between adjacent plane of load 11d in external thread part 11 distance D1b.Pair of female connector
Button lead is the distance D2a of the tube axis direction between adjacent inserting surface 21c in internal thread part 21.The load of female connector is led
Journey is the distance D2b of the tube axis direction between adjacent plane of load 21d in internal thread part 21.
Fig. 4 A is returned, the transformation of make-up lead and load lead is illustrated.As shown in Figure 4 A, on the top of male joint
The width of thread of end part, that is external thread part 11 can be changed in portion 112 (Fig. 3), and load lead is bigger than make-up lead.Equally
Ground, in the center portion of female connector, that is the width of thread of internal thread part 21 can be changed in portion 212 (Fig. 3), load lead
It is bigger than make-up lead.
It is right in the base end portion of male joint, that is in the constant portion 111 (Fig. 3) of the width of thread of external thread part 11
It is equal with load lead to detain lead.Similarly, in the end of female connector 20, that is the width of thread of internal thread part 21 is permanent
Determine in portion 211 (Fig. 3), make-up lead is equal with load lead.
Each load lead of male joint and female connector is in the constant on the whole of threaded portion.However, in male joint and
In female connector the two, each make-up lead change.I.e. in male joint and female connector the two, can from the width of thread
Make-up lead becomes larger when change portion switches to the constant portion of the width of thread.
As known to from Fig. 4 A, the width of thread of internal thread part can be changed the length L212 of the tube axis direction in portion than outer spiral shell
The width of thread in line portion can be changed the length L112 long of the tube axis direction in portion.The width of thread i.e. in male joint can be changed portion's switching
It can be changed the position that portion switches to the constant portion of the width of thread at the width of thread in the position and female connector in the constant portion of the width of thread
It is not fully consistent.Specifically, L212/L112 > 1.05.The reason is that connecing the position in male joint and female thread
In the case where completely the same, the thread of external thread part is difficult to be embedded in the thread groove of internal thread part, as a result, being difficult to pin thread
Connector is screwed into female connector.
(fastening method between male joint and female connector)
Then, the fastening method between each male joint 10 and female connector 20 is illustrated.
As described above, the nipple 1 of present embodiment is combined nipple.Thus, male joint 10 is from pipe
The both ends of axis direction are screwed into female connector 20 respectively.
B referring to Figures 1 and 2, if a male joint 10 is screwed into from one end of the tube axis direction of female connector 20,
The external thread part 11 of the male joint 10 and the internal thread part 21 of female connector 20 are interfered, in sometime point, external thread part 11
The width of thread can be changed portion 112 in plane of load 11d and inserting surface 11c contacted with female connector 20.More specifically, screw thread is wide
Spend the plane of load 11d and inserting surface 11c in variable portion 112 respectively with the plane of load 21d and inserting surface of corresponding internal thread part 21
21c contact.Similarly, if the other end of the tube axis direction by another male joint 10 from female connector 20 is screwed into, for
Another male joint 10, also in sometime point, the width of thread of external thread part 11 can be changed plane of load 11d in portion 112 and
Inserting surface 11c contacts (Fig. 2 B) with the plane of load 21d of corresponding internal thread part 21 and inserting surface 21c respectively.At the time point,
The top of male joint 10 as shown in Figure 1 each other not in contact with.
For example, nipple 1 requires high torsion in the case where nipple 1 is used in the horizon mining etc. of shale well
Square performance.In this case, each male joint 10 is further screwed into female connector 20 from the state of Fig. 1.I.e. in screw thread
After the plane of load 11d and inserting surface 11c and female connector 20 in variable-width portion 112 are contacted (Fig. 2 B), if further will be each
Male joint 10 is screwed into female connector 20, then the top of male joint 10 as shown in Figure 5 is in contact with each other.Male joint 10
Top contacts before the surrender of each external thread part 11 each other.Axle power is assigned to each male joint 10 as a result, torque rises.In order to
Axle power is reliably assigned to each male joint 10, the top of preferably each male joint 10 is by the ring substantially perpendicular with pipe axis CL
Shape face is constituted.
(effect of the 1st embodiment)
As described above, in the nipple of present embodiment 1, external thread part 11 has the constant portion 111 of the width of thread
It can be changed portion 112 with the width of thread.The thread groove width that the width of thread can be changed portion 112 connects from the constant portion 111 of the width of thread towards pin thread
First 10 top becomes larger, but the thread groove width in the constant portion 111 of the width of thread does not change.By by the constant portion of such width of thread
111 are set to external thread part 11, with compared with external thread part is the case where gradually changing thread groove width on the whole, can subtract
The difference of the small thread groove width generated in external thread part 11.Thus, in cutting using size corresponding with the smallest thread groove width
Cutting knife tool and in the case where being processed to external thread part 11, the cutting number of tube axis direction can be reduced.
Internal thread part 21 is correspondingly arranged with external thread part 11.I.e. internal thread part 21 has the screw thread with external thread part 11
The constant portion 211 of the corresponding width of thread, constant width portion 111.Thus, it is also possible to reduce thread groove width in internal thread part 21
Difference, the cutting number of tube axis direction can be reduced.
In this way, nipple 1 according to the present embodiment, can reduce pipe axis in external thread part 11 and internal thread part 21
The cutting number in line direction.Thus, it is possible to shorten the process time for the threaded portion being made of external thread part 11 and internal thread part 21.
In addition, there is the constant portion 111,211 of the width of thread and the width of thread can be changed portion for external thread part 11 and internal thread part 21
112,212.By the way that the constant portion 111,211 of such width of thread is set to external thread part 11 and internal thread part 21, with screw thread
Wide the comparing the case where gradually changing on the whole in external thread part 11 or internal thread part 12 of tooth, external thread part 11 or internal thread part
In the smallest thread it is wide and difference that maximum thread is wide becomes smaller.Thus, in external thread part and internal thread part, along
In the case that tube axis direction is applied with tensile load, it is difficult to generate in the root with the wide thread of the smallest thread and cuts
It cuts through bad.
As described above, the width of thread to become larger on the top that external thread part 11 is provided with thread groove width towards male joint 10
Variable portion 112.In internal thread part, it can be changed portion 112 with the width of thread of external thread part 11 and be correspondingly provided with thread groove width change
The width of thread of change can be changed portion 212.Thus, the nipple 1 of present embodiment also being capable of torque with higher.
As long as here, reducing the maximum thread groove width of external thread part and the difference of the smallest thread groove width and internal thread part
The difference of maximum thread groove width and the smallest thread groove width is just also possible to following form: in external thread part or internal thread part
The lesser width of thread of ratio that thread groove width and the wide variation of thread are respectively provided in overall length can be changed portion, and it is wide not have screw thread
Spend constant portion.However, external thread part and internal thread part are all set to have the ratio of thread groove width and the wide variation of thread
The biggish width of thread can be changed portion 111,211 and the form in the constant portion 112,212 of the width of thread has higher torque, therefore,
It is advantageous.
In external thread part 11, thread groove width W11max preferably at most be twice of the smallest thread groove width W11min with
Under.Thus, in external thread part 11, the cutting number of thread groove can be inhibited following twice.
In internal thread part 21, thread groove width W21max preferably at most be twice of the smallest thread groove width W21min with
Under.Thus, in internal thread part 21, the cutting number of thread groove can be inhibited following twice.
In the case where being applied with tensile load along tube axis direction, it is difficult to which the shearing generated at the root of thread is broken
Bad, therefore, in external thread part 11 and internal thread part 21, preferably the smallest thread width is set as the height of thread or more.
In each male joint 10 relative in being screwed into of female connector 20, the top of male joint 10 is wide in each screw thread each other
The time point that both inserting surface and the plane of load for spending variable portion 112 are contacted with female connector 20 mutually not in contact with.Especially
In the case where not requiring too big high torque performance, nipple 1 with the top of male joint 10 each other not in contact with state
It uses.
In the case where nipple 1 requires biggish high torque performance, by by each male joint 10 to female connector
20 are further torqued into, and the top of male joint 10 can be made to be in contact with each other before the surrender of each external thread part 11.Thereby, it is possible to right
Each male joint 10 assigns axle power, and increase torque.In this way, in the nipple 1 of present embodiment, it can be as needed
Improve torque.
In the nipple 1 of present embodiment, external thread part 11 and internal thread part 21 not only include the width of thread respectively
Constant portion 111,211 further includes that the width of thread can be changed portion 112,212.It is accordingly possible to ensure the torque needed.
Under tightening state, in the screw thread groove bottom of external thread part and the thread crest face contact of internal thread part and outer spiral shell
The thread top surface in line portion and the screw thread groove bottom of internal thread part are made of not in contact in the case where external thread part and internal thread part
Threaded portion do not have sealing performance.On the other hand, wide in screw thread under the tightening state of the nipple of present embodiment 1
It spending in variable portion 112,212, the screw thread groove bottom 11b of external thread part 11 is contacted with the thread top surface 21a of internal thread part 21, and
The thread top surface 11a of external thread part 11 is contacted with the screw thread groove bottom 21b of internal thread part 21.According to this structure, can
Sealing performance is assigned to the threaded portion being made of external thread part 11 and internal thread part 21.
[the 2nd embodiment]
Fig. 6 is the longitudinal section view for indicating the nipple 1A of the 2nd embodiment.Nipple 1A in male joint 10A and
Female connector 20A is respectively provided with circular bead surface 12,22 and this point of sealing surface 13,23 is different from the nipple 1 of the 1st embodiment.
The other structures of nipple 1A can be set as same as the nipple 1 of the 1st embodiment.
Male joint 10A includes circular bead surface 12 and sealing surface 13.Circular bead surface 12 is configured at the cardinal extremity of male joint 10A.
Circular bead surface 12 can be set as the circumferentia substantially perpendicular with pipe axis CL.Sealing surface 13 is set to the periphery of male joint 10A.
Sealing surface 13 is being configured between external thread part 11 and circular bead surface 12 in male joint 10A.
Female connector 20A includes circular bead surface 22 and sealing surface 23.The circular bead surface 12 of circular bead surface 22 and male joint 10A are opposite
It is arranged with answering.Circular bead surface 22 can be set as the circumferentia substantially perpendicular with pipe axis CL.Sealing surface 23 and male joint 10A's
Sealing surface 13 is correspondingly set to the inner circumferential of female connector 20A.Sealing surface 23 be configured at internal thread part 21 and circular bead surface 22 it
Between.
Sealing surface 13,23 is with male joint 10A being screwed into and contact with each other relative to female connector 20A, in fastening shape
State that is closely sealed and becoming interference fit is fitted under state.Sealing surface 13,23 forms the sealing contacted based on metal as a result,.Its
As a result, the sealing performance of nipple 1A improves.The sealing being made of sealing surface 13,23 plays excellent particular for external pressure
Sealing performance.
Circular bead surface 12,22 relative to being screwed into for female connector 20A contacts with each other and presses with male joint 10A.It is logical
It crosses circular bead surface 12,22 to be in contact with each other, assigns axle power to male joint 10A, torque rises.
Illustration omitted, but the external thread part 11 of male joint 10A is variable with the width of thread in a same manner as in the first embodiment
Portion.Circular bead surface 12,22 is in male joint 10A relative to both can be in the screw thread of external thread part 11 in being screwed into of female connector 20A
Plane of load and inserting surface in variable-width portion contact with each other with the female connector 20A time point contacted, can also be at this
Between put mutually not in contact with.
In can be changed plane of load in portion in the width of thread of external thread part 11 and inserting surface and female connector 20A contact
Time point, circular bead surface 12,22 are each other not in contact in the case where, by further twisting male joint 10A to female connector 20A
Enter, circular bead surface 12,22 can be made to be in contact with each other.It can be changed the plane of load and inserting surface in portion in the width of thread of external thread part 11
After being contacted with female connector 20A, male joint 10A is further screwed into female connector 20A, is surrendered in external thread part 11
Circular bead surface 12,22 is set to be in contact with each other before.As a result, to male joint 10A assign axle power, with circular bead surface 12,22 each other not in contact with
State compared to torque rise.Through such composition, can increase torque as needed in a same manner as in the first embodiment.
In the 2nd embodiment, male joint 10A has circular bead surface 12 and sealing surface 13, but male joint 10A can also be with
Only there is one of circular bead surface 12 and sealing surface 13.In this case, female connector 20A has the platform with male joint 10A
The corresponding circular bead surface 22 in shoulder face 12 or sealing surface 23 corresponding with the sealing surface 13 of male joint 10A.
[the 3rd embodiment]
Fig. 7 is the longitudinal section view for indicating the nipple 1B of the 3rd embodiment.Nipple 1B in male joint 10B and
Female connector 20B be respectively provided with sealing surface 14,24 this put it is different from the nipple 1 of the 1st embodiment.Nipple 1B its
His structure can be set as same as the nipple 1 of the 1st embodiment.
Male joint 10B includes sealing surface 14.Sealing surface 14 is set to the periphery of male joint 10B.Sealing surface 14 configures
In the tip portion of male joint 10B.
Female connector 20B includes sealing surface 24.Sealing surface 24 is correspondingly set to the sealing surface 14 of male joint 10B
The inner circumferential of female connector 20B.
Sealing surface 14,24 is with male joint 10B being screwed into and contact with each other relative to female connector 20B, in fastening shape
State that is closely sealed and becoming interference fit is fitted under state.Sealing surface 14,24 forms the sealing contacted based on metal as a result,.Its
As a result, the sealing performance of nipple 1B improves.The sealing being made of sealing surface 14,24 plays excellent particular for internal pressure
Sealing performance.
In the nipple 1B of the 3rd embodiment, it is also possible to male joint 10B also and has and is same with the 2nd embodiment
The sealing surface 13 (Fig. 6) of sample.In this case, female connector 20B has sealing surface 23 (Fig. 6) corresponding with sealing surface 13.
According to this structure, the sealing being made of sealing surface 14,24 can be utilized to improve the sealing performance for internal pressure, and
And improve the sealing performance for external pressure using the sealing being made of sealing surface 13,23.
[the 4th embodiment]
Fig. 8 is the longitudinal section view for indicating the nipple 1C of the 4th embodiment.In nipple 1C, male joint 10C
Sealing surface 14,24 in a same manner as in the third embodiment is respectively provided with female connector 20C.In addition, male joint 10C and female thread connect
Head 20C is respectively provided with circular bead surface 15,25.
Circular bead surface 15 is set to the top of male joint 10C.Circular bead surface 25 is corresponding with the circular bead surface 15 of male joint 10C
Ground is set to female connector 20C.It is preferred that circular bead surface 15,25 is made of the circumferentia substantially perpendicular with pipe axis CL respectively.
Circular bead surface 15,25 relative to being screwed into for female connector 20C contacts with each other and presses with male joint 10C.It is logical
It crosses circular bead surface 15,25 to be in contact with each other, to male joint 10C imparting axle power, torque rises.
The external thread part 11 of male joint 10C in a same manner as in the first embodiment there is the width of thread can be changed portion.Circular bead surface
15,25 in male joint 10C relative in being screwed into of female connector 20C both portion can be can be changed in the width of thread of external thread part 11
In plane of load and inserting surface contact with each other with the female connector 20C time point contacted, can also at the time point mutually not
Contact.
In can be changed plane of load in portion in the width of thread of external thread part 11 and inserting surface and female connector 20C contact
At time point, circular bead surface 15,25 is each other not in contact in the case where, by further twisting male joint 10C to female connector 20C
Enter, circular bead surface 15,25 can be made to be in contact with each other.That is, the width of thread in external thread part 11 can be changed plane of load and insertion in portion
After face and female connector 20C are contacted, male joint 10C is further torqued into female connector 20C, is bent in external thread part 11
Circular bead surface 15,25 is set to be in contact with each other before clothes.Axle power is assigned to male joint 10C as a result, is not connect each other with circular bead surface 15,25
The state of touching rises compared to torque.As long as so constituting, it will be able to make on torque as needed in a same manner as in the first embodiment
It rises.
In the 4th embodiment, male joint 10C has circular bead surface 15 and sealing surface 14, but male joint 10C can also be with
Only there is one of circular bead surface 15 and sealing surface 14.In this case, female connector 20C has the platform with male joint 10C
The corresponding circular bead surface 25 in shoulder face 15 or sealing surface 24 corresponding with the sealing surface 14 of male joint 10C.
It is also possible to male joint 10C also and has circular bead surface 12 in a same manner as in the second embodiment.That is male joint 10C
There can be circular bead surface 12,15 in cardinal extremity and top.In this case, female connector 20C has the shoulder with male joint 10C
Distinguish corresponding circular bead surface 22,25 in face 12,15.
[variation]
More than, each embodiment is illustrated, but the present invention is not limited to the respective embodiments described above, as long as not taking off
From its purport, so that it may make various changes.
In the respective embodiments described above, external thread part and internal thread part are wide by the constant portion of a width of thread and a screw thread
Variable portion is spent to constitute.However, external thread part and internal thread part also can include the constant portion of multiple widths of thread and/or multiple screw threads
Variable-width portion.In the case where external thread part and internal thread part include the constant portion of multiple widths of thread, each width of thread is constant
Portion also can have mutually different thread groove width.It include the feelings that multiple widths of thread can be changed portion in external thread part and internal thread part
Under condition, the change rate that each width of thread can be changed the thread groove width in portion both can be identical, can also be different.
In the respective embodiments described above, external thread part and internal thread part are made of the screw thread of swallowtail shape.However, external screw thread
It's not limited to that for the thread shape of portion and internal thread part.External thread part and internal thread part can also be by such as trapezoidal thread structures
At.
In the respective embodiments described above, external thread part and internal thread part are made of 1 section of screw thread, but also can be by multi-segment thread
It constitutes.In addition, the threaded portion being made of external thread part and internal thread part is either one start screw, is also possible to double thread.
In above-mentioned 2nd embodiment and the 4th embodiment, male joint has circular bead surface on top and/or cardinal extremity.So
And male joint also can have the intermediate circular bead surface for being set to middle part.Female connector be provided with in male joint
Between the corresponding intermediate circular bead surface of circular bead surface.Male joint and female connector can also be respectively provided with more than two intermediate shoulders
Face.In this case, external thread part and internal thread part are by constituting intermediate circular bead surface multi-segment thread sandwiched therebetween.
In above-mentioned 3rd embodiment (Fig. 7), it is configured with external seal face 14 in the tip portion of male joint, in female thread
The corresponding part of connector has inner sealing surface 24.However, it is also possible to substitute the construction or used simultaneously with the construction and
The top of one male joint is configured with external seal face, is configured with inner sealing surface on the top of another male joint.As a result, two
The sealing surface of a male joint forms the sealing contacted based on metal.As a result, the sealing performance of nipple improves.
Embodiment
In order to confirm the disclosure nipple effect, carried out test below.
(embodiment)
Fig. 9 is the longitudinal section view of the nipple of embodiment.Implement the external thread part 11 in nipple shown in Fig. 9
Processing, measures its process time.
The constant portion 111 of the constant width of thread of thread groove width and thread groove width are formd from constant 111 court, portion of the width of thread
The width of thread become larger to the top of male joint 10 can be changed portion 112.The constant portion 111 of the width of thread and the width of thread are variable
The equal length of the tube axis direction in portion 112.I.e. the 1/2 of external thread part 11 is the constant portion 111 of the width of thread.As a result, outside
In threaded portion 11, maximum thread groove width W11max becomes twice of the smallest thread groove width W11min.
Adding for external thread part 11 has been carried out using the cutting tool of size corresponding with the smallest thread groove width W11min
Work.As described above, maximum thread groove width W11max is twice of the smallest thread groove width W11min in external thread part 11.
Thus, the cutting number of the tube axis direction of the thread groove with the smallest thread groove width W11min is set as 1, is had maximum
The cutting number (maximum cutting number) of the tube axis direction of the thread groove of thread groove width W11max becomes 2.In addition, pipe axis side
To total cutting number become 14.
(comparative example)
Figure 10 is the longitudinal section view of the nipple of comparative example.Implement the external thread part 31 in nipple shown in Fig. 10
Processing, its process time is measured.
In the nipple of comparative example, change thread groove width on the whole in external thread part 31.External thread part 31
Thread groove width becomes larger from the cardinal extremity of male joint 30 towards top.The length and implementation of the tube axis direction of external thread part 31
The length of the tube axis direction of the external thread part 11 of example is roughly equal.The change rate of the thread groove width of external thread part 31 also with implementation
The change rate that the width of thread of example can be changed the thread groove width in portion 112 is substantially the same.As a result, in external thread part 31, it is maximum
Thread groove width become 4 times of the smallest thread groove width.
The processing of external thread part 31 has been carried out using the cutting tool of size corresponding with the smallest thread groove width.Outside
In threaded portion 31, maximum thread groove width is 4 times of the smallest thread groove width, and therefore, maximum cutting number becomes 4.In addition, pipe
Total cutting number of axis direction becomes 28.
(evaluation)
The chart of the process time of embodiment and the respective nipple of comparative example is shown in FIG. 11.It is outer in embodiment
The maximum cutting number of threaded portion 11 and total cutting number are the maximum cutting number of the external thread part 31 of comparative example respectively and total
Cut the 1/2 of number.Thus, as shown in figure 11, the process time of the external thread part 11 of embodiment also becomes the outer spiral shell of comparative example
About the 1/2 of the process time in line portion 31.
As described above, it confirms: and not including screw thread by the way that the constant portion 111 of the width of thread is arranged in external thread part 11
The external thread part 31 in constant width portion compares, and can shorten the process time of external thread part 11.For having and external thread part
The internal thread part 21 of 11 corresponding structures, can also expect same effect.
Industrial availability
The present invention is applied to nipple.
Claims (6)
1. a kind of nipple is the nipple for linking a pair of of pipe, wherein
The nipple has:
Male joint has external thread part in periphery；
Female connector has internal thread part corresponding with the external thread part in inner circumferential, fastens with the male joint,
The external thread part includes:
The constant portion of the width of thread, with constant thread groove width；
The width of thread can be changed portion, more than the thread groove width in the constant portion of the width of thread with the external thread part and from described outer
The thread groove width that the top of the width of thread of threaded portion constant portion towards the male joint becomes larger,
The internal thread part includes:
The constant portion of the width of thread, it is wide with constant thread；
The width of thread can be changed portion, and the thread in the constant portion of the width of thread with the internal thread part is wide above and from described interior
The thread that the center of the width of thread of threaded portion constant portion towards the female connector becomes larger is wide.
2. nipple according to claim 1, wherein
The maximum thread groove width of the external thread part is twice or less of the smallest thread groove width of the external thread part.
3. nipple according to claim 1 or 2, wherein
In the male joint relative in being screwed into of the female connector, the top of the male joint is in the width of thread
The time point that both the inserting surface and plane of load in variable portion and the female connector contact not with it is tight with the female connector
The tip contact of fixed another male joint, the width of thread can be changed both inserting surface and plane of load in portion with it is described
Tip contact after female connector contacts and before external thread part surrender with another male joint.
4. nipple according to claim 1 or 2, wherein
The male joint also has circular bead surface,
The female connector is also equipped with circular bead surface, which is correspondingly arranged with the circular bead surface of the male joint, tight
It can be with the shoulder face contact of the male joint under solid fraction state.
5. nipple according to claim 4, wherein
In the male joint relative in being screwed into of the female connector, the circular bead surface of the male joint is wide in the screw thread
The time point that both inserting surface and the plane of load for spending variable portion are contacted with the female connector not with the female connector
Shoulder face contact, after both inserting surface and the plane of load that the width of thread can be changed portion are contacted with the female connector
And the shoulder face contact before the external thread part surrender with the female connector.
6. nipple according to any one of claims 1 to 5, wherein
The length that the width of thread of the internal thread part can be changed the tube axis direction in portion can than the width of thread of the external thread part
The length of the tube axis direction in change portion is long.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016181176 | 2016-09-16 | ||
| JP2016-181176 | 2016-09-16 | ||
| PCT/JP2017/033564 WO2018052140A1 (en) | 2016-09-16 | 2017-09-15 | Threaded joint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109477599A true CN109477599A (en) | 2019-03-15 |
| CN109477599B CN109477599B (en) | 2021-03-09 |
Family
ID=61619540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780044012.6A Active CN109477599B (en) | 2016-09-16 | 2017-09-15 | Threaded joint |
Country Status (13)
| Country | Link |
|---|---|
| US (1) | US11248725B2 (en) |
| EP (1) | EP3514431B1 (en) |
| JP (1) | JP6633214B2 (en) |
| CN (1) | CN109477599B (en) |
| AU (1) | AU2017327625B2 (en) |
| BR (1) | BR112018072626B1 (en) |
| CA (1) | CA3026557C (en) |
| EA (1) | EA036439B1 (en) |
| MX (1) | MX2019001297A (en) |
| MY (1) | MY191070A (en) |
| PL (1) | PL3514431T3 (en) |
| UA (1) | UA122450C2 (en) |
| WO (1) | WO2018052140A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114174708A (en) * | 2019-09-02 | 2022-03-11 | 日本制铁株式会社 | Threaded joint for steel pipe |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BR112018072626B1 (en) * | 2016-09-16 | 2022-07-26 | Vallourec Oil And Gas France | THREADED CONNECTION |
| WO2020183860A1 (en) * | 2019-03-14 | 2020-09-17 | Ｊｆｅスチール株式会社 | Threaded joint |
| EP4108969A1 (en) * | 2019-03-27 | 2022-12-28 | Nippon Steel Corporation | Threaded coupling for steel pipe |
| FR3101659B1 (en) * | 2019-10-08 | 2022-01-21 | Vallourec Oil & Gas France | THREADED JOINT WITH SEALING FACE MADE BY ADDITIVE MANUFACTURING |
| EP3835541A1 (en) * | 2019-12-13 | 2021-06-16 | Vallourec Oil And Gas France | Threaded connection partially in a self-locking engagement with an external shoulder capable to resist elevated torque |
| CA3149762C (en) | 2020-01-17 | 2024-03-26 | Nippon Steel Corporation | Threaded connection for pipe |
| EP3854987B1 (en) * | 2020-01-27 | 2023-08-02 | Vallourec Oil And Gas France | Self-locking threaded connection partially in non-locking engagement |
| US11614186B1 (en) | 2020-03-25 | 2023-03-28 | PTC Liberty Tubulars LLC | Box connection for a pin with relieved thread region |
| EP3992418B1 (en) * | 2020-10-28 | 2023-08-02 | Vallourec Oil And Gas France | Self-locking threaded connection partially in non-locking engagement |
| CN116583655A (en) * | 2020-11-23 | 2023-08-11 | 美国钢铁公司 | Threaded pipe connection with improved tightness |
| EP4102025B1 (en) | 2021-06-07 | 2023-06-07 | Vallourec Oil And Gas France | Self-locking threaded connection partially in non-locking engagement |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020027363A1 (en) * | 1999-04-19 | 2002-03-07 | Mallis David Llewellyn | Wedge thread with torque shoulder |
| JP2002524712A (en) * | 1998-09-07 | 2002-08-06 | バローレック・マネスマン・オイル・アンド・ガス・フランス | Threaded connection of two metal tubes with grooves in the thread |
| JP2008527256A (en) * | 2004-12-30 | 2008-07-24 | ハイドリル・カンパニー・エルピー | Floating wedge screw for cylindrical connection |
| WO2014199619A1 (en) * | 2013-06-14 | 2014-12-18 | Ｊｆｅスチール株式会社 | Threaded joint for oil well pipe |
| WO2015083382A1 (en) * | 2013-12-05 | 2015-06-11 | 新日鐵住金株式会社 | Threaded joint for steel pipes |
| WO2015105054A1 (en) * | 2014-01-09 | 2015-07-16 | 新日鐵住金株式会社 | Threaded joint for steel pipe |
| CN105308257A (en) * | 2013-05-23 | 2016-02-03 | 瓦卢瑞克石油天然气法国有限公司 | Assembly for producing a threaded connection for drilling and operating hydrocarbon wells, and resulting threaded connection |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US30647A (en) | 1860-11-13 | Improvement in forming cartridge-cases | ||
| US34467A (en) | 1862-02-18 | Improvement in machines for cutting twist-moldings | ||
| USRE30647E (en) * | 1975-04-23 | 1981-06-16 | Hydril Company | Tubular connection |
| US4485511A (en) | 1982-08-11 | 1984-12-04 | Pmc Industries, Inc. | Die head with different axial tool paths |
| GB8323858D0 (en) * | 1983-09-06 | 1983-10-05 | Hunting Oilfield Services Ltd | Pipe connectors |
| US5338074A (en) * | 1989-03-02 | 1994-08-16 | The Hydril Company | Threaded pipe connection |
| CA1322773C (en) * | 1989-07-28 | 1993-10-05 | Erich F. Klementich | Threaded tubular connection |
| DE4345119C1 (en) | 1993-12-30 | 1995-05-11 | Mannesmann Ag | Pipe connector |
| US6206436B1 (en) * | 1999-02-19 | 2001-03-27 | Hydril Company | Differential wedge thread for threaded connector |
| US6976711B2 (en) | 2002-04-19 | 2005-12-20 | Hydril Company Lp | Threaded connection especially for radially plastically expandable conduit |
| US7458616B2 (en) | 2004-12-30 | 2008-12-02 | Hydril Company | Threads with perturbations |
| FR2939861B1 (en) | 2008-12-16 | 2010-12-24 | Vallourec Mannesmann Oil & Gas France | TUBULAR JOINT WITH AUTOBLOATING THREAD USED IN THE PETROLEUM INDUSTRY |
| FR2945604B1 (en) * | 2009-05-12 | 2011-06-03 | Vallourec Mannesmann Oil & Gas | ASSEMBLY FOR THE PRODUCTION OF A THREADED JOINT FOR DRILLING AND OPERATING HYDROCARBON WELLS AND RESULTING THREAD |
| UA112576C2 (en) | 2012-06-07 | 2016-09-26 | Ніппон Стіл Енд Сумітомо Метал Корпорейшн | RIVER CONNECTION FOR STEEL PIPE |
| US11149882B2 (en) | 2016-09-16 | 2021-10-19 | Nippon Steel Corporation | Threaded connection |
| BR112018072626B1 (en) * | 2016-09-16 | 2022-07-26 | Vallourec Oil And Gas France | THREADED CONNECTION |
-
2017
- 2017-09-15 BR BR112018072626-5A patent/BR112018072626B1/en active IP Right Grant
- 2017-09-15 CA CA3026557A patent/CA3026557C/en active Active
- 2017-09-15 AU AU2017327625A patent/AU2017327625B2/en active Active
- 2017-09-15 JP JP2018539202A patent/JP6633214B2/en active Active
- 2017-09-15 UA UAA201900722A patent/UA122450C2/en unknown
- 2017-09-15 US US16/314,030 patent/US11248725B2/en active Active
- 2017-09-15 PL PL17851037T patent/PL3514431T3/en unknown
- 2017-09-15 WO PCT/JP2017/033564 patent/WO2018052140A1/en unknown
- 2017-09-15 MY MYPI2018002470A patent/MY191070A/en unknown
- 2017-09-15 MX MX2019001297A patent/MX2019001297A/en unknown
- 2017-09-15 EA EA201990120A patent/EA036439B1/en not_active IP Right Cessation
- 2017-09-15 CN CN201780044012.6A patent/CN109477599B/en active Active
- 2017-09-15 EP EP17851037.6A patent/EP3514431B1/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002524712A (en) * | 1998-09-07 | 2002-08-06 | バローレック・マネスマン・オイル・アンド・ガス・フランス | Threaded connection of two metal tubes with grooves in the thread |
| US20020027363A1 (en) * | 1999-04-19 | 2002-03-07 | Mallis David Llewellyn | Wedge thread with torque shoulder |
| JP2008527256A (en) * | 2004-12-30 | 2008-07-24 | ハイドリル・カンパニー・エルピー | Floating wedge screw for cylindrical connection |
| CN105308257A (en) * | 2013-05-23 | 2016-02-03 | 瓦卢瑞克石油天然气法国有限公司 | Assembly for producing a threaded connection for drilling and operating hydrocarbon wells, and resulting threaded connection |
| WO2014199619A1 (en) * | 2013-06-14 | 2014-12-18 | Ｊｆｅスチール株式会社 | Threaded joint for oil well pipe |
| WO2015083382A1 (en) * | 2013-12-05 | 2015-06-11 | 新日鐵住金株式会社 | Threaded joint for steel pipes |
| WO2015105054A1 (en) * | 2014-01-09 | 2015-07-16 | 新日鐵住金株式会社 | Threaded joint for steel pipe |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114174708A (en) * | 2019-09-02 | 2022-03-11 | 日本制铁株式会社 | Threaded joint for steel pipe |
| CN114174708B (en) * | 2019-09-02 | 2023-03-17 | 日本制铁株式会社 | Threaded joint for steel pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| CA3026557C (en) | 2020-12-22 |
| MY191070A (en) | 2022-05-30 |
| BR112018072626B1 (en) | 2022-07-26 |
| JPWO2018052140A1 (en) | 2019-02-14 |
| CN109477599B (en) | 2021-03-09 |
| PL3514431T3 (en) | 2020-10-19 |
| EA036439B1 (en) | 2020-11-11 |
| US11248725B2 (en) | 2022-02-15 |
| EP3514431B1 (en) | 2020-04-15 |
| UA122450C2 (en) | 2020-11-10 |
| EP3514431A1 (en) | 2019-07-24 |
| JP6633214B2 (en) | 2020-01-22 |
| MX2019001297A (en) | 2019-04-25 |
| BR112018072626A2 (en) | 2019-02-19 |
| EA201990120A1 (en) | 2019-08-30 |
| EP3514431A4 (en) | 2019-10-16 |
| US20210231240A1 (en) | 2021-07-29 |
| CA3026557A1 (en) | 2018-03-22 |
| AU2017327625B2 (en) | 2019-10-03 |
| AU2017327625A1 (en) | 2018-12-13 |
| WO2018052140A1 (en) | 2018-03-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109477599A (en) | Nipple | |
| US9194190B2 (en) | Threaded joint for pipe | |
| CN109563951B (en) | Threaded joint | |
| US10774598B2 (en) | Threaded joint for steel pipes | |
| CN108138994B (en) | Threaded joint for steel pipe | |
| CN108474504B (en) | Threaded joint for steel pipe | |
| JP6919967B2 (en) | Threaded joints for oil country tubular goods | |
| CN110088519A (en) | Nipple | |
| US20180258709A1 (en) | Screw joint for pipe (as amended) | |
| AU2019356283B2 (en) | Threaded joint | |
| JP2005240888A (en) | Screw joint for oil-well pipe | |
| EP3009725A1 (en) | Threaded joint for oil well pipe | |
| WO2001075347A1 (en) | Slim type oil well pipe fitting | |
| US9593786B1 (en) | Leak proof threaded connector | |
| EP2977662B1 (en) | Threaded joint for oil well pipe | |
| CN108952595B (en) | Air-tight seal threaded joint | |
| WO2018216375A1 (en) | Threaded joint for steel pipes | |
| CN106168121B (en) | The integral threaded joint structure of tube upset applied to tubing and casing | |
| CN114320175A (en) | Thread joint is buckled on gluing fast of preventing detaining | |
| OA19323A (en) | Threaded joint. |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: Tokyo, Japan, Japan Applicant after: Nippon Iron & Steel Corporation Applicant after: VALLOUREC MANNESMANN OIL & GAS FRANCE Address before: Tokyo, Japan, Japan Applicant before: Nippon Steel Corporation Applicant before: VALLOUREC MANNESMANN OIL & GAS FRANCE |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |